The 3 Gaster brothers. those numbers under all 3 sprites is the year they were made. Nightmare Gaster man-1976 Gaster man-1986 Negative Gaster man- 1994 Nightmare Gaster man-Big brother Gaster man- middle brother Negative Gaster man- little brother kinda reminds me of we bare bears
The music is Abandoned Memory- (Mega Man X Style)
